Printing was complicated in those days because a computer couldn't hold a bitmap of a printed page in memory and still do anything. Early PostScript printers were also much more powerful than the PCs that drove them, often with 32 bit RISC CPUs, dozens of megabytes of RAM and some even had SCSI disks.

Now that most computers can hold a page in their L2 caches, it's easy and much faster to render in-memory and send a bitmap over to the printer driver to let it print with whatever options it wants. All the driver needs is to accept a bitmap and print it as well as it can and you can safely ignore most of the printer's own PDL.

Most of the thorny issues in printing are with special-purpose printers - thermal, barcode, embedded text only, etc.

Apple uses CUPS and it should work fine with older printers. Last time I checked, CUPS could handle an HP Deskjet 500 (if you have the parallel port)